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vaporstat wired in series with pressuretrol

josephcjosephc Posts: 35Member
Does anyone have a diagram showing how to wire these two instruments in series? Also my pressuretrol doesnt have an R or B label on either terminal.

What i have done is wire #1 from boiler to term R on vaporstat and then connected a wire from there to the pressuretrol on one of its terminals. Then the other wire #2 from boiler to the B terminal on vaporstat. Then a wire from there to the other terminal on the pressuretrol. Is this considered in series since going through both switches?
Thank you
Joe

Comments

  • Jamie HallJamie Hall Posts: 10,671Member
    No. You've wired them in parallel. Boiler, terminal R on vapourstat. Terminal B on vapourstat to one of the pressuretrols. Other terminal on pressuretrol back to #2 on boiler -- assuming you have no other safeties. If there are other safeties, then go to them before you go back to the boiler.
    Jamie



    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.



    Hoffman Equipped System (all original except boiler), Weil-Mclain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch
  • josephcjosephc Posts: 35Member
    Thank you; Ive corrected it. Since there isnt an R or B on the pressuretrol terminals is it correct to assume it doesnt mater which one is wired to the vaporstat and which continues on to the boiler.
  • Jamie HallJamie Hall Posts: 10,671Member
    josephc said:

    Thank you; Ive corrected it. Since there isnt an R or B on the pressuretrol terminals is it correct to assume it doesnt mater which one is wired to the vaporstat and which continues on to the boiler.

    Correct. It's just a simple switch.
    Jamie



    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.



    Hoffman Equipped System (all original except boiler), Weil-Mclain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch
  • EBEBRATT-EdEBEBRATT-Ed Posts: 5,921Member
    @Jamie Hall is correct assuming the pressure control is a "break on rise" pressure control with only two terminals which is the most likely senario
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